What is the origin of the idiom "nose of wax" and when to use it?

The idiom "nose of wax" originates from a metaphorical comparison to a malleable substance, wax, which can be easily shaped or manipulated. It is often used to describe someone who is easily influenced or swayed by others, lacking firm principles or convictions. When using this idiom, it implies that the person's opinions or actions can be easily changed or molded by external forces, suggesting a lack of strength or firmness in character.